Tumbling barrel liner



SePt- 4, 1945, 5. E. HUENEFAUTH ETAL l y l2,384,170

TUMBLING BARREL LINER Filed Nov. 6, 1944 cago, Ill., assignors to Crown Rheostat.& `Supply i Co. Chicago, Ill.,a corporation of Illinois Claims.

The present invention relates to tumbling barrels and particularly to the liners employed in such barrels. In the application of Joseph Abenanti, Serial No. 506,667, filed October 18, 1943, there is shown a tumbling barrel of a general nature to which our invention applies. In such Ibarrels the lining is so arranged as to be removasble. It Wears out rather rapidly and has to be replaced frequently. We find that, particularly in the method of finishing metal articles that utilizes a large body of material such as granite stone as a carrier for the metal articles to be finished, the wearing is such a serious problem as to cause serious delays in production while the liners are being replaced in the ends of the barrels long before the lining around the periphery is worn out.

It is the purpose of this invention to provide a novel liner construction for the barrel ends that will enable them to withstand the excessive wear to which they are subjective, thereby avoiding the necessity of such frequent replacements.

In tumbling barrels where the method of nishing hereinbeiore described is practiced, the ends of the barrels have the stone and the metal articles rolling across them continuously along the steep face of the advancing mass of material. The peripheral portion of the barrel, of course, gets some wear from the particles. However, during mostof the time that a particle or metal article is moving from the lower edge of the surface of the material to the point where it will again roll down across the upper face of the mass of material there is little or no wear by such a particle or article because there is no movement relatively to the Ibarrel Wall. 'I'he customary practice is to ll tumbling b'arrel to a level slightly above the middle thereto. This means that the central portions of the ends of the barrel have the material rolling across them continually and at the center of each end the wear is at its maximum. Our invention contemplates means to prevent the central end portions from wearing so fast.

The advantages of our invention will appear more fully from the following description and the accompanying drawing. It should be understood, however, that the drawing and description are illustrative only and should not be taken as limiting the invention except insofar as it is limited by the claims.

In the drawing:

Figure 1 is a cross sectional view through a tumbling barrel embodying our invention;

Figure 2 is a longitudinal sectional view taken substantially on the line 2-2 of Figure 1; and

Figure 3 is a perspective view o1' a. strip of wear Patented Sept. 4, 1945 resistant'iatearwnich is utuizea in construct: ing a tumbling barrel in accordance with Our invention.

Referring now to the drawing, the tumbling barrel as shown in Figure 1 comprises an outer shell I0 of sheet metal having an opening at II adapted to be Iclosed by a suitable closure and having a removalble section at I2 which can be taken oi to permit removal of the barrel lining.

The barrel peripheral lining consists of removable sections I3 extending lengthwise to the barrel and abutting each other circumferentiality of the barrel` to form a lining for the annular portion of the barrel. The lining for the barrel ends I4 and `barrel partitions I5 comprises a plurality of Wooden strips I6 eut to the proper length to fit one on top of the other in the manner illustrated in Figure 1 with spaces I1 between the strips as indicated at I6 in Figure 2. The several strips are provided with dowel pins I8 at spaced points along their length. These pinsare utilized to secure wear strips I9 in place in the spaces I1 between the several strips I6. The wear strips are constructed of a material dissimilar to the wood and of a substantially higher resistance to abrasion. For example, .the wooden strip I6 should be properly constructed of two inch thick maple walls. The wear strips are molded of a composition of Bakelite or a combination of rubber and canvas Voelting or equivalent material having a high resistance to albrasion. The strips I9 actually serve as a b'uffer to protect the wooden strips near the center. We find that in use the wear takes place somewhat as illustrated in Figure 2. The wooden strips still wear more near the center of the end of the barrel, but as the wear gets deeper more and more of the Wear is taken by the strips I9, and this results in obtaining a greater life in the lining as well as a better tumbling action because of the engagement of the parts and the particles with the projecting strips I9. The strips I9 are notched as shown at 20 to enga-ge the dowel pins I' so that they cannot escape from between the adjacent Wooden strips.

The great saving effected by the utilizing of the strip I9 lies in the time necessary to replace the barrel lining. It takes the men several hours to remove the lining from a barrel and replace it. The material cost of the lining is slight when compared to the cost of the work of relining. With our improvement it is possible to more than double the life of the end linings of the barrel,

It is believed' that the nature and advantages of our invention will be clear from the foregoing description. Having thus described our invention, we claim:

1. In a tumbling barrel a lining for the ends of the barrel comprising separate wooden strips and narrow strips between the wooden strips,

l said narrow strips having a substantially higher resistance to abrasion than the wooden strips, whereby the excessive abrasion of the end lining near the barrel axis counteracted by said strips.

2. In a tumbling barrel, a lining for the barrel ends comprising separate wooden strips, dowel pins extending between adjacent wooden stripsV and narrow strips, of a material having aV much higher resistance to abrasion by the tumbling operation, interposed between the wooden strips. said dowel pins being positioned narrow strips in place. Y

3. In a tumbling barrel, a lining for the barrel ends comprising separate wooden strips, dowel pins extending between` adjacent wooden strips and narrow strips, of a material having a vmuch higher resistance to abrasion by the tumbling operation, interposed between the wooden strips, the narrow strips having portions cut out around f said dowel pins whereby the dowel pins hold the narrow strips between the wooden strips and the adjacent edges of the narrow strips protect the dowel pins.

4. In a tumbling barrel, a lining for the ends of saidbarrelV comprising separate wood strips, narrow strips of molded Bakelite between the Wooden strips, and means carried by the wooden Y strips to hold the narrow strips in place.

vto secure. theV 5. In a tumbling barrel, a lining for the ends of said barrel comprising separate wood strips, narrow strips of rubber and canvas belting between the wooden strips, and means carried by the Awoodenl strips to hold the narrow strips in place.

' GEORGE E. HUENERFAUTH.

FRED P. GREEN. 

